XML formatter & validator
Paste XML to pretty-print or validate it — parsed with the browser's own DOMParser, not uploaded to our servers for processing.
Tool processing runs in your browser — your pastes/files are not uploaded to our servers for processing.Details
Quick answer
TryDevSnip formats and validates XML entirely in your browser using DOMParser and XMLSerializer. Malformed XML gets a clear parsererror message instead of a silent failure.
Security note. Do not paste production secrets into any webpage if shared devices or extensions are in your threat model.Processing stays in your browser — inputs are not uploaded to our servers for processing.
Output
Embed this tool
Paste this iframe on your site. Includes a backlink to XML Formatter. Opens chrome-less with ?embed=1.
Frequently asked questions
How do I format XML?
Paste XML and click Format. The browser’s own DOMParser checks it is well-formed, then the tool re-indents it with two-space nesting entirely in your tab.
What happens if the XML is invalid?
DOMParser reports a parsererror node with the reason and, in most browsers, a line/column hint. This tool surfaces that message directly instead of guessing.
Does this validate against a schema (XSD/DTD)?
No — it checks that the XML is well-formed (matching tags, one root element, valid syntax), not that it conforms to a specific XSD or DTD. Full schema validation needs a dedicated XSD validator.
Are comments and CDATA preserved?
Yes. XMLSerializer round-trips comments, processing instructions, and CDATA sections; only whitespace between tags is normalized for readability.
Is my XML uploaded?
No. TryDevSnip parses and formats XML in your browser. Nothing you paste is uploaded to our servers for processing.